Teams running the Zimbra Collaboration Suite version 8.8.15 are urged to apply a manual fix against a recently discovered zero-day vulnerability that’s being actively exploited in the wild.

The Zimbra cloud suite offers email, calendar functions, and other enterprise collaboration tools. The vulnerability compromises the security of data on Zimbra servers, the company said in its security advisory.

“A security vulnerability in Zimbra Collaboration Suite Version 8.8.15 that could potentially impact the confidentiality and integrity of your data has surfaced,” the company said. “We take this matter very seriously and have already taken immediate action to address the issue.”